The Washer,flat, cataloged under National Stock Number 5310-00-262-4393, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-262-4393 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Overall Diameter | 1.875 INCHES NOMINAL IN |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Departure From Cited Designator | AS MODIFIED BY THK |
| Nondefinitive Spec/std Data | A TYPE AND 2 GRADE AND A CLASS |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.177 INCHES MINIMUM AND 1.197 INCHES MAXIMUM IN |
| Thickness | 0.21875 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| N8889PC5 | 5/9 Secondary reference General Motors Corp |
| FF-W-92B TYPE A GR 11 CLASS A | 4/1 Identification reference U.S. Government activity |
| FFW92TYPEAGRADE2CLASSA | 5/9 Secondary reference U.S. Government activity |
| N12889PC5 | 5/9 Secondary reference General Motors Corp |
| 3202482 | 5/9 Secondary reference General Motors Corp |
| N9949PC5 | 5/9 Secondary reference General Motors Corp |
NSN 5310-00-262-4393 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5910-01-037-2529. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-262-4393: Overall Diameter: 1.875 INCHES NOMINAL IN; Material Document and Classification: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Departure From Cited Designator: AS MODIFIED BY THK. 10 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.